./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.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 ca4ee3dd 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/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --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-ca4ee3d-m [2024-09-20 19:01:44,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:01:44,722 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:01:44,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:01:44,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:01:44,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:01:44,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:01:44,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:01:44,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:01:44,766 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:01:44,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:01:44,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:01:44,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:01:44,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:01:44,771 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:01:44,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:01:44,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:01:44,772 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:01:44,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:01:44,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:01:44,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:01:44,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:01:44,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:01:44,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:01:44,774 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:01:44,774 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:01:44,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:01:44,774 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:01:44,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:01:44,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:01:44,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:01:44,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:01:44,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:01:44,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:01:44,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:01:44,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:01:44,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:01:44,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:01:44,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:01:44,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:01:44,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:01:44,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:01:44,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:01:45,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:01:45,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:01:45,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:01:45,076 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:01:45,077 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:01:45,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-20 19:01:46,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:01:46,782 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:01:46,782 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-20 19:01:46,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/69af47822/bc7d1e5d6ec948d3b939a8d913668d3b/FLAGfdb0ff4a1 [2024-09-20 19:01:46,808 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/69af47822/bc7d1e5d6ec948d3b939a8d913668d3b [2024-09-20 19:01:46,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:01:46,811 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:01:46,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:01:46,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:01:46,819 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:01:46,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:01:46" (1/1) ... [2024-09-20 19:01:46,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201eef3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:46, skipping insertion in model container [2024-09-20 19:01:46,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:01:46" (1/1) ... [2024-09-20 19:01:46,846 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:01:47,008 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/egcd2-ll.c[490,503] [2024-09-20 19:01:47,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:01:47,052 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:01:47,063 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/egcd2-ll.c[490,503] [2024-09-20 19:01:47,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:01:47,100 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:01:47,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47 WrapperNode [2024-09-20 19:01:47,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:01:47,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:01:47,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:01:47,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:01:47,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,124 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:01:47,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:01:47,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:01:47,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:01:47,125 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:01:47,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,138 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,152 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 19:01:47,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:01:47,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:01:47,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:01:47,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:01:47,170 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (1/1) ... [2024-09-20 19:01:47,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:01:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:47,205 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) [2024-09-20 19:01:47,209 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 [2024-09-20 19:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:01:47,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:01:47,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:01:47,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:01:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:01:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:01:47,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:01:47,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:01:47,303 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:01:47,305 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:01:47,476 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 19:01:47,476 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:01:47,495 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:01:47,495 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:01:47,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:01:47 BoogieIcfgContainer [2024-09-20 19:01:47,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:01:47,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:01:47,498 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:01:47,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:01:47,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:01:46" (1/3) ... [2024-09-20 19:01:47,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68baae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:01:47, skipping insertion in model container [2024-09-20 19:01:47,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:01:47" (2/3) ... [2024-09-20 19:01:47,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68baae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:01:47, skipping insertion in model container [2024-09-20 19:01:47,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:01:47" (3/3) ... [2024-09-20 19:01:47,505 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-09-20 19:01:47,524 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:01:47,524 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:01:47,581 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:01:47,587 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;@c82efef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:01:47,588 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:01:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:01:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 19:01:47,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:47,601 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] [2024-09-20 19:01:47,601 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:47,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:47,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1130788706, now seen corresponding path program 1 times [2024-09-20 19:01:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:47,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301121994] [2024-09-20 19:01:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:47,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:01:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:01:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:01:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:01:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:01:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301121994] [2024-09-20 19:01:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301121994] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:01:47,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:01:47,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:01:47,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968859397] [2024-09-20 19:01:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:01:47,848 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:01:47,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:47,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:01:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:01:47,878 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-09-20 19:01:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:47,903 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2024-09-20 19:01:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:01:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 31 [2024-09-20 19:01:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:47,914 INFO L225 Difference]: With dead ends: 64 [2024-09-20 19:01:47,914 INFO L226 Difference]: Without dead ends: 31 [2024-09-20 19:01:47,918 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 [2024-09-20 19:01:47,924 INFO L434 NwaCegarLoop]: 42 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, 42 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 [2024-09-20 19:01:47,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:01:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-20 19:01:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-20 19:01:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 19:01:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-09-20 19:01:47,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 31 [2024-09-20 19:01:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:47,967 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-09-20 19:01:47,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-09-20 19:01:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-09-20 19:01:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:01:47,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:47,970 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] [2024-09-20 19:01:47,970 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:01:47,970 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:47,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1704590499, now seen corresponding path program 1 times [2024-09-20 19:01:47,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:47,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700807572] [2024-09-20 19:01:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:01:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:01:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:01:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:01:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:01:48,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:48,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700807572] [2024-09-20 19:01:48,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700807572] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:48,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361292934] [2024-09-20 19:01:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:48,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:48,333 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) [2024-09-20 19:01:48,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:01:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:48,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:01:48,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:01:48,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:01:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361292934] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:01:48,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:01:48,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-20 19:01:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983779350] [2024-09-20 19:01:48,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:01:48,613 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:01:48,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:01:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:01:48,615 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:01:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:48,723 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-09-20 19:01:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:01:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-20 19:01:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:48,725 INFO L225 Difference]: With dead ends: 48 [2024-09-20 19:01:48,725 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 19:01:48,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:01:48,727 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:48,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:01:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 19:01:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-20 19:01:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 19:01:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2024-09-20 19:01:48,743 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 32 [2024-09-20 19:01:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:48,744 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2024-09-20 19:01:48,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:01:48,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2024-09-20 19:01:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 19:01:48,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:48,749 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] [2024-09-20 19:01:48,762 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:01:48,952 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:48,953 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:48,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1312615442, now seen corresponding path program 1 times [2024-09-20 19:01:48,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:48,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831584556] [2024-09-20 19:01:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:48,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:01:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186720336] [2024-09-20 19:01:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:48,987 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) [2024-09-20 19:01:48,989 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:01:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:01:49,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:01:49,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:01:49,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831584556] [2024-09-20 19:01:49,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:01:49,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186720336] [2024-09-20 19:01:49,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186720336] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:01:49,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:01:49,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:01:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053044303] [2024-09-20 19:01:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:01:49,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:01:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:01:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:01:49,100 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-20 19:01:49,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:49,172 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-09-20 19:01:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:01:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 33 [2024-09-20 19:01:49,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:49,177 INFO L225 Difference]: With dead ends: 63 [2024-09-20 19:01:49,177 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 19:01:49,177 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:01:49,178 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 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 [2024-09-20 19:01:49,179 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:01:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 19:01:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-09-20 19:01:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:01:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2024-09-20 19:01:49,201 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 33 [2024-09-20 19:01:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:49,202 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2024-09-20 19:01:49,202 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-20 19:01:49,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2024-09-20 19:01:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 19:01:49,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:49,207 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] [2024-09-20 19:01:49,221 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:01:49,407 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:49,408 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:49,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1674155548, now seen corresponding path program 1 times [2024-09-20 19:01:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:49,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881279425] [2024-09-20 19:01:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:49,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:01:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:01:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:01:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:01:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 19:01:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:01:49,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:49,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881279425] [2024-09-20 19:01:49,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881279425] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:49,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321059772] [2024-09-20 19:01:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:49,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:49,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:49,533 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) [2024-09-20 19:01:49,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:01:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:49,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:01:49,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:01:49,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:01:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321059772] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:01:49,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:01:49,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-20 19:01:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592576385] [2024-09-20 19:01:49,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:01:49,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:01:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:01:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:01:49,696 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:01:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:49,791 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-20 19:01:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:01:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-20 19:01:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:49,793 INFO L225 Difference]: With dead ends: 60 [2024-09-20 19:01:49,793 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 19:01:49,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:01:49,795 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:49,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:01:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 19:01:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-20 19:01:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:01:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-20 19:01:49,813 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2024-09-20 19:01:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:49,814 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-20 19:01:49,814 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:01:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-20 19:01:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 19:01:49,815 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:49,815 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] [2024-09-20 19:01:49,834 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:01:50,021 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:50,022 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:50,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1754125331, now seen corresponding path program 1 times [2024-09-20 19:01:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608569761] [2024-09-20 19:01:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:01:50,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515021467] [2024-09-20 19:01:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:50,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:50,075 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) [2024-09-20 19:01:50,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:01:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:50,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:01:50,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 19:01:50,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:01:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608569761] [2024-09-20 19:01:50,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:01:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515021467] [2024-09-20 19:01:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515021467] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:01:50,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:01:50,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:01:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097065123] [2024-09-20 19:01:50,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:01:50,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:01:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:01:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:01:50,344 INFO L87 Difference]: Start difference. First operand 55 states and 68 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, (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) [2024-09-20 19:01:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:50,429 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-09-20 19:01:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:01:50,430 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, (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 48 [2024-09-20 19:01:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:50,431 INFO L225 Difference]: With dead ends: 62 [2024-09-20 19:01:50,431 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:01:50,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:01:50,432 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:50,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:01:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:01:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-20 19:01:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:01:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-09-20 19:01:50,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 48 [2024-09-20 19:01:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:50,457 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-09-20 19:01:50,458 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, (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) [2024-09-20 19:01:50,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-09-20 19:01:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:01:50,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:50,462 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] [2024-09-20 19:01:50,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:01:50,662 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:50,663 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:50,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -914162351, now seen corresponding path program 1 times [2024-09-20 19:01:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:50,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581799878] [2024-09-20 19:01:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:01:50,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463321824] [2024-09-20 19:01:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:50,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:50,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:50,703 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) [2024-09-20 19:01:50,705 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:01:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:50,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 19:01:50,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 19:01:50,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 19:01:50,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581799878] [2024-09-20 19:01:50,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:01:50,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463321824] [2024-09-20 19:01:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463321824] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:50,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:01:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-20 19:01:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114730385] [2024-09-20 19:01:50,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:50,985 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:01:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:01:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:01:50,986 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 19:01:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:51,123 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-09-20 19:01:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:01:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-20 19:01:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:51,125 INFO L225 Difference]: With dead ends: 87 [2024-09-20 19:01:51,125 INFO L226 Difference]: Without dead ends: 85 [2024-09-20 19:01:51,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:01:51,127 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:51,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 203 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:01:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-20 19:01:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2024-09-20 19:01:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:01:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-09-20 19:01:51,143 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 55 [2024-09-20 19:01:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:51,144 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-09-20 19:01:51,144 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 19:01:51,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-09-20 19:01:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-20 19:01:51,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:51,146 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2024-09-20 19:01:51,167 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:01:51,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:01:51,350 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:51,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -268943045, now seen corresponding path program 1 times [2024-09-20 19:01:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:51,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425061669] [2024-09-20 19:01:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:01:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:01:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:01:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:01:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:01:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:01:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:01:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 19:01:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 19:01:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 19:01:51,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425061669] [2024-09-20 19:01:51,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425061669] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:01:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342786765] [2024-09-20 19:01:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:51,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:51,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:51,518 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) [2024-09-20 19:01:51,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:01:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:51,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:01:51,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 19:01:51,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 19:01:51,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342786765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:51,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:01:51,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-20 19:01:51,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993508284] [2024-09-20 19:01:51,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:51,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 19:01:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 19:01:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:01:51,729 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:01:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:51,940 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-09-20 19:01:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:01:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2024-09-20 19:01:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:51,942 INFO L225 Difference]: With dead ends: 102 [2024-09-20 19:01:51,942 INFO L226 Difference]: Without dead ends: 94 [2024-09-20 19:01:51,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:01:51,945 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:51,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:01:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-20 19:01:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-20 19:01:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-20 19:01:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-09-20 19:01:51,974 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 57 [2024-09-20 19:01:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:51,974 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-09-20 19:01:51,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 19:01:51,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-09-20 19:01:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:01:51,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:51,976 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2024-09-20 19:01:51,994 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:01:52,180 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:52,181 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:52,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2145912741, now seen corresponding path program 1 times [2024-09-20 19:01:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189270174] [2024-09-20 19:01:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:01:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664874612] [2024-09-20 19:01:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:52,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:52,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:52,201 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) [2024-09-20 19:01:52,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:01:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:01:52,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 19:01:52,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 19:01:52,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 19:01:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189270174] [2024-09-20 19:01:52,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:01:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664874612] [2024-09-20 19:01:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664874612] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:52,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:01:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-20 19:01:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124088709] [2024-09-20 19:01:52,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:52,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:01:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:01:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:01:52,788 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-20 19:01:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:53,833 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-20 19:01:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:01:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-09-20 19:01:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:53,836 INFO L225 Difference]: With dead ends: 136 [2024-09-20 19:01:53,836 INFO L226 Difference]: Without dead ends: 133 [2024-09-20 19:01:53,836 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:01:53,837 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:53,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:01:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-20 19:01:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-09-20 19:01:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 9 states have call predecessors, (49), 8 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-20 19:01:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2024-09-20 19:01:53,894 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 63 [2024-09-20 19:01:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:53,895 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2024-09-20 19:01:53,895 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-20 19:01:53,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2024-09-20 19:01:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 19:01:53,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:53,899 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] [2024-09-20 19:01:53,916 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:01:54,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:54,102 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:54,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009882, now seen corresponding path program 2 times [2024-09-20 19:01:54,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:54,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966685932] [2024-09-20 19:01:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:54,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:01:54,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604980516] [2024-09-20 19:01:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:01:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:54,131 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) [2024-09-20 19:01:54,132 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:01:54,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:01:54,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:54,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 19:01:54,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-20 19:01:54,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:01:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 19:01:54,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:01:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966685932] [2024-09-20 19:01:54,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:01:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604980516] [2024-09-20 19:01:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604980516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:01:54,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:01:54,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-20 19:01:54,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815411675] [2024-09-20 19:01:54,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:01:54,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:01:54,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:01:54,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:01:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:01:54,817 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-20 19:01:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:01:56,095 INFO L93 Difference]: Finished difference Result 243 states and 366 transitions. [2024-09-20 19:01:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:01:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2024-09-20 19:01:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:01:56,098 INFO L225 Difference]: With dead ends: 243 [2024-09-20 19:01:56,099 INFO L226 Difference]: Without dead ends: 241 [2024-09-20 19:01:56,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:01:56,100 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:01:56,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 287 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:01:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-20 19:01:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2024-09-20 19:01:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 85 states have call successors, (85), 11 states have call predecessors, (85), 10 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2024-09-20 19:01:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2024-09-20 19:01:56,186 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 68 [2024-09-20 19:01:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:01:56,186 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2024-09-20 19:01:56,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-20 19:01:56,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2024-09-20 19:01:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 19:01:56,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:01:56,188 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2024-09-20 19:01:56,207 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 19:01:56,392 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:56,393 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:01:56,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:01:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1448853371, now seen corresponding path program 3 times [2024-09-20 19:01:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:01:56,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853730431] [2024-09-20 19:01:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:01:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:01:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:01:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693943718] [2024-09-20 19:01:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:01:56,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:01:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:01:56,411 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) [2024-09-20 19:01:56,416 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:01:56,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:01:56,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:01:56,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-20 19:01:56,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:01:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:01:57,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853730431] [2024-09-20 19:02:12,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693943718] [2024-09-20 19:02:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693943718] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:12,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:02:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 19:02:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722009815] [2024-09-20 19:02:12,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:12,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:02:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:02:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:02:12,355 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-20 19:02:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:14,254 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2024-09-20 19:02:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 19:02:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2024-09-20 19:02:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:14,257 INFO L225 Difference]: With dead ends: 227 [2024-09-20 19:02:14,257 INFO L226 Difference]: Without dead ends: 225 [2024-09-20 19:02:14,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:02:14,260 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:14,261 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:02:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-20 19:02:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2024-09-20 19:02:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 89 states have call successors, (89), 14 states have call predecessors, (89), 13 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-20 19:02:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2024-09-20 19:02:14,342 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 73 [2024-09-20 19:02:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:14,344 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2024-09-20 19:02:14,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-20 19:02:14,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2024-09-20 19:02:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:02:14,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:14,346 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2024-09-20 19:02:14,365 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:02:14,546 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 19:02:14,546 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:14,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 910050682, now seen corresponding path program 1 times [2024-09-20 19:02:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133027924] [2024-09-20 19:02:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:14,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104881569] [2024-09-20 19:02:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:14,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:14,572 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) [2024-09-20 19:02:14,573 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:02:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:14,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 19:02:14,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-20 19:02:15,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-20 19:02:15,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133027924] [2024-09-20 19:02:15,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104881569] [2024-09-20 19:02:15,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104881569] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:15,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:02:15,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-20 19:02:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264887813] [2024-09-20 19:02:15,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:15,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:02:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:02:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:02:15,878 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-20 19:02:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:18,793 INFO L93 Difference]: Finished difference Result 353 states and 532 transitions. [2024-09-20 19:02:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:02:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 79 [2024-09-20 19:02:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:18,798 INFO L225 Difference]: With dead ends: 353 [2024-09-20 19:02:18,801 INFO L226 Difference]: Without dead ends: 349 [2024-09-20 19:02:18,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:02:18,803 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:18,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 609 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 19:02:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-20 19:02:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-09-20 19:02:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 181 states have internal predecessors, (225), 150 states have call successors, (150), 17 states have call predecessors, (150), 16 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-20 19:02:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2024-09-20 19:02:19,003 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 79 [2024-09-20 19:02:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:19,004 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2024-09-20 19:02:19,004 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-20 19:02:19,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2024-09-20 19:02:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-20 19:02:19,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:19,006 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-09-20 19:02:19,024 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:19,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:02:19,207 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:19,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash 623896260, now seen corresponding path program 1 times [2024-09-20 19:02:19,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:19,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904766946] [2024-09-20 19:02:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:19,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075957343] [2024-09-20 19:02:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:19,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:19,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:19,249 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) [2024-09-20 19:02:19,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:02:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:19,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 19:02:19,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-20 19:02:20,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:22,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:22,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904766946] [2024-09-20 19:02:22,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:22,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075957343] [2024-09-20 19:02:22,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075957343] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:22,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:02:22,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 19:02:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223479052] [2024-09-20 19:02:22,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:22,178 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:02:22,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:02:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:02:22,179 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-20 19:02:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:23,329 INFO L93 Difference]: Finished difference Result 358 states and 533 transitions. [2024-09-20 19:02:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:02:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 95 [2024-09-20 19:02:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:23,332 INFO L225 Difference]: With dead ends: 358 [2024-09-20 19:02:23,332 INFO L226 Difference]: Without dead ends: 356 [2024-09-20 19:02:23,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:02:23,333 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:23,334 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 369 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 19:02:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-20 19:02:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2024-09-20 19:02:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 184 states have (on average 1.2554347826086956) internal successors, (231), 187 states have internal predecessors, (231), 150 states have call successors, (150), 19 states have call predecessors, (150), 18 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-20 19:02:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 528 transitions. [2024-09-20 19:02:23,491 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 528 transitions. Word has length 95 [2024-09-20 19:02:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:23,491 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 528 transitions. [2024-09-20 19:02:23,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-20 19:02:23,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 528 transitions. [2024-09-20 19:02:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 19:02:23,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:23,493 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-09-20 19:02:23,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 19:02:23,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:23,698 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:23,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 658114285, now seen corresponding path program 4 times [2024-09-20 19:02:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317874219] [2024-09-20 19:02:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:02:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:02:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:02:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:02:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:02:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:02:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 19:02:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 19:02:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 19:02:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 19:02:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 19:02:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 19:02:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-20 19:02:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 19:02:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 19:02:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-20 19:02:23,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:23,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317874219] [2024-09-20 19:02:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317874219] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:02:23,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:02:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:02:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549174772] [2024-09-20 19:02:23,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:02:23,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:02:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:02:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:02:23,880 INFO L87 Difference]: Start difference. First operand 353 states and 528 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-20 19:02:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:24,031 INFO L93 Difference]: Finished difference Result 426 states and 629 transitions. [2024-09-20 19:02:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:02:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2024-09-20 19:02:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:24,034 INFO L225 Difference]: With dead ends: 426 [2024-09-20 19:02:24,034 INFO L226 Difference]: Without dead ends: 230 [2024-09-20 19:02:24,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:02:24,038 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:24,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:02:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-20 19:02:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-09-20 19:02:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 78 states have call successors, (78), 19 states have call predecessors, (78), 18 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-20 19:02:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 279 transitions. [2024-09-20 19:02:24,117 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 279 transitions. Word has length 98 [2024-09-20 19:02:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:24,117 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 279 transitions. [2024-09-20 19:02:24,117 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-20 19:02:24,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 279 transitions. [2024-09-20 19:02:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 19:02:24,119 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:24,119 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 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, 1] [2024-09-20 19:02:24,120 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-20 19:02:24,120 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:24,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -825105347, now seen corresponding path program 1 times [2024-09-20 19:02:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:24,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563460665] [2024-09-20 19:02:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:02:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:02:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 19:02:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:02:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:02:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 19:02:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 19:02:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 19:02:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 19:02:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 19:02:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 19:02:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 19:02:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 19:02:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 19:02:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 19:02:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 19:02:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-20 19:02:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 19:02:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-20 19:02:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:24,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563460665] [2024-09-20 19:02:24,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563460665] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:24,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607245065] [2024-09-20 19:02:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:24,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:24,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:24,302 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) [2024-09-20 19:02:24,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 19:02:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:02:24,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:02:24,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-09-20 19:02:24,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-20 19:02:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607245065] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:24,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:02:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-20 19:02:24,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846970904] [2024-09-20 19:02:24,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:24,472 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:02:24,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:24,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:02:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:02:24,472 INFO L87 Difference]: Start difference. First operand 206 states and 279 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-20 19:02:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:24,725 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-09-20 19:02:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:02:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 109 [2024-09-20 19:02:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:24,727 INFO L225 Difference]: With dead ends: 232 [2024-09-20 19:02:24,727 INFO L226 Difference]: Without dead ends: 220 [2024-09-20 19:02:24,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:02:24,728 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:24,729 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:02:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-20 19:02:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-09-20 19:02:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.150943396226415) internal successors, (122), 108 states have internal predecessors, (122), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-09-20 19:02:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2024-09-20 19:02:24,816 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 109 [2024-09-20 19:02:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:24,816 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2024-09-20 19:02:24,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-20 19:02:24,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2024-09-20 19:02:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-20 19:02:24,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:24,818 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:02:24,834 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:25,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 19:02:25,018 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:25,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:25,019 INFO L85 PathProgramCache]: Analyzing trace with hash 429591308, now seen corresponding path program 2 times [2024-09-20 19:02:25,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:25,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562571080] [2024-09-20 19:02:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:25,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:25,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680404238] [2024-09-20 19:02:25,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:02:25,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:25,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:25,040 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) [2024-09-20 19:02:25,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 19:02:25,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:02:25,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:25,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 19:02:25,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-09-20 19:02:25,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562571080] [2024-09-20 19:02:25,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680404238] [2024-09-20 19:02:25,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680404238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:25,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:02:25,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 19:02:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747121628] [2024-09-20 19:02:25,911 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:25,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:02:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:02:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:02:25,916 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-20 19:02:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:26,754 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2024-09-20 19:02:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 19:02:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2024-09-20 19:02:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:26,756 INFO L225 Difference]: With dead ends: 231 [2024-09-20 19:02:26,756 INFO L226 Difference]: Without dead ends: 229 [2024-09-20 19:02:26,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:02:26,757 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:26,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:02:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-20 19:02:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2024-09-20 19:02:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-20 19:02:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2024-09-20 19:02:26,851 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 110 [2024-09-20 19:02:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:26,851 INFO L474 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2024-09-20 19:02:26,851 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-20 19:02:26,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2024-09-20 19:02:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 19:02:26,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:26,853 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:02:26,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 19:02:27,053 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 19:02:27,054 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:27,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1625892333, now seen corresponding path program 3 times [2024-09-20 19:02:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:27,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884938801] [2024-09-20 19:02:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:27,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546855862] [2024-09-20 19:02:27,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:02:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:27,074 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) [2024-09-20 19:02:27,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 19:02:27,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:02:27,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:27,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 19:02:27,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-20 19:02:27,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-20 19:02:28,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:28,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884938801] [2024-09-20 19:02:28,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:28,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546855862] [2024-09-20 19:02:28,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546855862] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:02:28,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:02:28,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-09-20 19:02:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386033538] [2024-09-20 19:02:28,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:28,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 19:02:28,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 19:02:28,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:02:28,927 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-20 19:02:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:31,572 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2024-09-20 19:02:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 19:02:31,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2024-09-20 19:02:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:31,575 INFO L225 Difference]: With dead ends: 267 [2024-09-20 19:02:31,575 INFO L226 Difference]: Without dead ends: 265 [2024-09-20 19:02:31,575 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 19:02:31,576 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:31,576 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 482 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 19:02:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-20 19:02:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2024-09-20 19:02:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 101 states have call successors, (101), 22 states have call predecessors, (101), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-20 19:02:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2024-09-20 19:02:31,698 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 115 [2024-09-20 19:02:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:31,699 INFO L474 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2024-09-20 19:02:31,699 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-20 19:02:31,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2024-09-20 19:02:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-20 19:02:31,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:31,701 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:02:31,717 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 19:02:31,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 19:02:31,901 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:31,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 34587587, now seen corresponding path program 4 times [2024-09-20 19:02:31,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:31,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035642008] [2024-09-20 19:02:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299718063] [2024-09-20 19:02:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:02:31,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:31,933 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) [2024-09-20 19:02:31,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 19:02:32,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:02:32,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:32,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:02:32,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-20 19:02:33,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:33,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035642008] [2024-09-20 19:02:33,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299718063] [2024-09-20 19:02:33,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299718063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:33,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:02:33,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 19:02:33,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342507947] [2024-09-20 19:02:33,124 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:33,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:02:33,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:02:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:02:33,125 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 19:02:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:34,336 INFO L93 Difference]: Finished difference Result 295 states and 404 transitions. [2024-09-20 19:02:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:02:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2024-09-20 19:02:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:34,339 INFO L225 Difference]: With dead ends: 295 [2024-09-20 19:02:34,339 INFO L226 Difference]: Without dead ends: 293 [2024-09-20 19:02:34,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:02:34,340 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:34,340 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 19:02:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-20 19:02:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2024-09-20 19:02:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 146 states have internal predecessors, (164), 104 states have call successors, (104), 22 states have call predecessors, (104), 21 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-20 19:02:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2024-09-20 19:02:34,514 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 117 [2024-09-20 19:02:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:34,515 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2024-09-20 19:02:34,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 19:02:34,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2024-09-20 19:02:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-20 19:02:34,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:34,517 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-20 19:02:34,534 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 19:02:34,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 19:02:34,721 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:34,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1783402708, now seen corresponding path program 5 times [2024-09-20 19:02:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:34,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041649945] [2024-09-20 19:02:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:34,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335806759] [2024-09-20 19:02:34,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:02:34,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:34,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:34,742 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) [2024-09-20 19:02:34,744 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 19:02:34,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:02:34,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:34,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-20 19:02:34,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-20 19:02:35,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:02:56,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:02:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041649945] [2024-09-20 19:02:56,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:02:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335806759] [2024-09-20 19:02:56,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335806759] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:02:56,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:02:56,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-20 19:02:56,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021798669] [2024-09-20 19:02:56,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:02:56,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:02:56,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:02:56,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:02:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=722, Unknown=2, NotChecked=0, Total=870 [2024-09-20 19:02:56,980 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 19:02:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:02:57,873 INFO L93 Difference]: Finished difference Result 285 states and 382 transitions. [2024-09-20 19:02:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:02:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 120 [2024-09-20 19:02:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:02:57,876 INFO L225 Difference]: With dead ends: 285 [2024-09-20 19:02:57,876 INFO L226 Difference]: Without dead ends: 283 [2024-09-20 19:02:57,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=235, Invalid=1095, Unknown=2, NotChecked=0, Total=1332 [2024-09-20 19:02:57,877 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:02:57,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:02:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-20 19:02:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2024-09-20 19:02:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 152 states have (on average 1.138157894736842) internal successors, (173), 155 states have internal predecessors, (173), 104 states have call successors, (104), 25 states have call predecessors, (104), 24 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-20 19:02:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2024-09-20 19:02:58,046 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 120 [2024-09-20 19:02:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:02:58,046 INFO L474 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2024-09-20 19:02:58,047 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 19:02:58,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2024-09-20 19:02:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-20 19:02:58,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:02:58,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:02:58,057 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 19:02:58,250 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:58,251 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:02:58,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:02:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2078513889, now seen corresponding path program 2 times [2024-09-20 19:02:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:02:58,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831335772] [2024-09-20 19:02:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:02:58,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:02:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:02:58,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424956246] [2024-09-20 19:02:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:02:58,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:02:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:02:58,276 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) [2024-09-20 19:02:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 19:02:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:02:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:02:58,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 19:02:58,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:02:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-20 19:02:58,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:03:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-20 19:03:00,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:03:00,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831335772] [2024-09-20 19:03:00,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:03:00,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424956246] [2024-09-20 19:03:00,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424956246] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:03:00,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:03:00,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-09-20 19:03:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43812792] [2024-09-20 19:03:00,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:03:00,382 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:03:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:03:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:03:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:03:00,383 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-20 19:03:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:03:06,240 INFO L93 Difference]: Finished difference Result 414 states and 593 transitions. [2024-09-20 19:03:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 19:03:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 126 [2024-09-20 19:03:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:03:06,243 INFO L225 Difference]: With dead ends: 414 [2024-09-20 19:03:06,243 INFO L226 Difference]: Without dead ends: 412 [2024-09-20 19:03:06,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=569, Invalid=2401, Unknown=0, NotChecked=0, Total=2970 [2024-09-20 19:03:06,244 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:03:06,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 591 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-20 19:03:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-09-20 19:03:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2024-09-20 19:03:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 202 states have (on average 1.183168316831683) internal successors, (239), 205 states have internal predecessors, (239), 162 states have call successors, (162), 28 states have call predecessors, (162), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2024-09-20 19:03:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 560 transitions. [2024-09-20 19:03:06,596 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 560 transitions. Word has length 126 [2024-09-20 19:03:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:03:06,598 INFO L474 AbstractCegarLoop]: Abstraction has 392 states and 560 transitions. [2024-09-20 19:03:06,598 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-20 19:03:06,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 560 transitions. [2024-09-20 19:03:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-20 19:03:06,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:03:06,601 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-20 19:03:06,621 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 19:03:06,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:06,806 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:03:06,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash -627102050, now seen corresponding path program 2 times [2024-09-20 19:03:06,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:03:06,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904357882] [2024-09-20 19:03:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:03:06,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:03:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:03:06,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221053545] [2024-09-20 19:03:06,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:03:06,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:03:06,829 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) [2024-09-20 19:03:06,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 19:03:06,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:03:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:03:06,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 19:03:06,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:03:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-09-20 19:03:07,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:03:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-20 19:03:07,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:03:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904357882] [2024-09-20 19:03:07,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:03:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221053545] [2024-09-20 19:03:07,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221053545] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:03:07,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:03:07,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-20 19:03:07,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630543682] [2024-09-20 19:03:07,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:03:07,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 19:03:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:03:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 19:03:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:03:07,917 INFO L87 Difference]: Start difference. First operand 392 states and 560 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-20 19:03:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:03:10,863 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2024-09-20 19:03:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 19:03:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 131 [2024-09-20 19:03:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:03:10,865 INFO L225 Difference]: With dead ends: 415 [2024-09-20 19:03:10,865 INFO L226 Difference]: Without dead ends: 405 [2024-09-20 19:03:10,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:03:10,867 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 67 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:03:10,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 695 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 19:03:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-20 19:03:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2024-09-20 19:03:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 206 states have internal predecessors, (238), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-20 19:03:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2024-09-20 19:03:11,131 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 131 [2024-09-20 19:03:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:03:11,131 INFO L474 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2024-09-20 19:03:11,131 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-20 19:03:11,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2024-09-20 19:03:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-20 19:03:11,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:03:11,133 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:03:11,147 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 19:03:11,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:11,337 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:03:11,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash 231977005, now seen corresponding path program 6 times [2024-09-20 19:03:11,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:03:11,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267895194] [2024-09-20 19:03:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:03:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:03:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:03:11,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252622300] [2024-09-20 19:03:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:03:11,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:03:11,366 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) [2024-09-20 19:03:11,368 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 19:03:11,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 19:03:11,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:03:11,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-20 19:03:11,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:03:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-09-20 19:03:14,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:03:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:03:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267895194] [2024-09-20 19:03:21,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:03:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252622300] [2024-09-20 19:03:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252622300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:03:21,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:03:21,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 19:03:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706750420] [2024-09-20 19:03:21,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:03:21,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:03:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:03:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:03:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2024-09-20 19:03:21,344 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-20 19:03:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:03:26,716 INFO L93 Difference]: Finished difference Result 440 states and 609 transitions. [2024-09-20 19:03:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:03:26,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 132 [2024-09-20 19:03:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:03:26,719 INFO L225 Difference]: With dead ends: 440 [2024-09-20 19:03:26,719 INFO L226 Difference]: Without dead ends: 438 [2024-09-20 19:03:26,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=181, Invalid=940, Unknown=1, NotChecked=0, Total=1122 [2024-09-20 19:03:26,720 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:03:26,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 476 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-20 19:03:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-20 19:03:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2024-09-20 19:03:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 226 states have (on average 1.154867256637168) internal successors, (261), 227 states have internal predecessors, (261), 171 states have call successors, (171), 35 states have call predecessors, (171), 34 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-20 19:03:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 601 transitions. [2024-09-20 19:03:27,060 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 601 transitions. Word has length 132 [2024-09-20 19:03:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:03:27,060 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 601 transitions. [2024-09-20 19:03:27,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-20 19:03:27,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 601 transitions. [2024-09-20 19:03:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-20 19:03:27,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:03:27,062 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:03:27,070 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 19:03:27,266 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 19:03:27,267 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:03:27,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash -456505470, now seen corresponding path program 7 times [2024-09-20 19:03:27,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:03:27,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411805815] [2024-09-20 19:03:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:03:27,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:03:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:03:27,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512699893] [2024-09-20 19:03:27,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:03:27,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:03:27,286 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) [2024-09-20 19:03:27,287 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 19:03:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:03:27,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 19:03:27,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:03:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 132 proven. 75 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-09-20 19:03:28,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:03:28,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:03:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411805815] [2024-09-20 19:03:28,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:03:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512699893] [2024-09-20 19:03:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512699893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:03:28,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:03:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-20 19:03:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984227676] [2024-09-20 19:03:28,943 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:03:28,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:03:28,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:03:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:03:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:03:28,944 INFO L87 Difference]: Start difference. First operand 432 states and 601 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-20 19:03:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:03:30,139 INFO L93 Difference]: Finished difference Result 466 states and 646 transitions. [2024-09-20 19:03:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:03:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 139 [2024-09-20 19:03:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:03:30,145 INFO L225 Difference]: With dead ends: 466 [2024-09-20 19:03:30,145 INFO L226 Difference]: Without dead ends: 464 [2024-09-20 19:03:30,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-09-20 19:03:30,148 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:03:30,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 465 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:03:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-09-20 19:03:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2024-09-20 19:03:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 242 states have internal predecessors, (278), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:03:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 642 transitions. [2024-09-20 19:03:30,467 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 642 transitions. Word has length 139 [2024-09-20 19:03:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:03:30,468 INFO L474 AbstractCegarLoop]: Abstraction has 462 states and 642 transitions. [2024-09-20 19:03:30,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-20 19:03:30,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 642 transitions. [2024-09-20 19:03:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 19:03:30,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:03:30,469 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:03:30,482 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 19:03:30,670 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 19:03:30,670 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:03:30,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1541639723, now seen corresponding path program 8 times [2024-09-20 19:03:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:03:30,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430820939] [2024-09-20 19:03:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:03:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:03:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:03:30,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356859575] [2024-09-20 19:03:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:03:30,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:30,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:03:30,694 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) [2024-09-20 19:03:30,697 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 19:03:30,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:03:30,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:03:30,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-20 19:03:30,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:03:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 96 proven. 107 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-20 19:03:31,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:03:54,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:03:54,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430820939] [2024-09-20 19:03:54,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:03:54,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356859575] [2024-09-20 19:03:54,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356859575] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:03:54,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:03:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 19:03:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483816624] [2024-09-20 19:03:54,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:03:54,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:03:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:03:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:03:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=559, Unknown=3, NotChecked=0, Total=702 [2024-09-20 19:03:54,097 INFO L87 Difference]: Start difference. First operand 462 states and 642 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-20 19:03:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:03:55,359 INFO L93 Difference]: Finished difference Result 472 states and 651 transitions. [2024-09-20 19:03:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:03:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 142 [2024-09-20 19:03:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:03:55,362 INFO L225 Difference]: With dead ends: 472 [2024-09-20 19:03:55,362 INFO L226 Difference]: Without dead ends: 470 [2024-09-20 19:03:55,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=243, Invalid=944, Unknown=3, NotChecked=0, Total=1190 [2024-09-20 19:03:55,363 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:03:55,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:03:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-09-20 19:03:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2024-09-20 19:03:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:03:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 645 transitions. [2024-09-20 19:03:55,666 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 645 transitions. Word has length 142 [2024-09-20 19:03:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:03:55,666 INFO L474 AbstractCegarLoop]: Abstraction has 466 states and 645 transitions. [2024-09-20 19:03:55,666 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-20 19:03:55,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 645 transitions. [2024-09-20 19:03:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 19:03:55,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:03:55,668 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:03:55,682 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 19:03:55,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:55,868 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:03:55,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:03:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1016913677, now seen corresponding path program 9 times [2024-09-20 19:03:55,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:03:55,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899373198] [2024-09-20 19:03:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:03:55,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:03:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:03:55,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391494518] [2024-09-20 19:03:55,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:03:55,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:03:55,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:03:55,890 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) [2024-09-20 19:03:55,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 19:03:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:03:55,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:03:55,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 19:03:55,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:03:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-09-20 19:03:58,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:03:58,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:03:58,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899373198] [2024-09-20 19:03:58,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:03:58,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391494518] [2024-09-20 19:03:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391494518] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:03:58,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:03:58,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 19:03:58,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836260957] [2024-09-20 19:03:58,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:03:58,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:03:58,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:03:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:03:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:03:58,403 INFO L87 Difference]: Start difference. First operand 466 states and 645 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-20 19:03:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:03:59,852 INFO L93 Difference]: Finished difference Result 486 states and 662 transitions. [2024-09-20 19:03:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:03:59,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2024-09-20 19:03:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:03:59,855 INFO L225 Difference]: With dead ends: 486 [2024-09-20 19:03:59,855 INFO L226 Difference]: Without dead ends: 484 [2024-09-20 19:03:59,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:03:59,856 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:03:59,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 541 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:03:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-20 19:04:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2024-09-20 19:04:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 254 states have internal predecessors, (290), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:04:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2024-09-20 19:04:00,281 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 142 [2024-09-20 19:04:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:04:00,282 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2024-09-20 19:04:00,282 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-20 19:04:00,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2024-09-20 19:04:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-20 19:04:00,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:04:00,283 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2024-09-20 19:04:00,296 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 19:04:00,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 19:04:00,484 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:04:00,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1445963081, now seen corresponding path program 3 times [2024-09-20 19:04:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:04:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769026096] [2024-09-20 19:04:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:04:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:04:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:04:00,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191078928] [2024-09-20 19:04:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:04:00,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:04:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:04:00,504 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) [2024-09-20 19:04:00,505 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 19:04:00,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 19:04:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:04:00,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 19:04:00,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:04:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 95 proven. 37 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-09-20 19:04:01,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:04:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:04:06,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769026096] [2024-09-20 19:04:06,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:04:06,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191078928] [2024-09-20 19:04:06,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191078928] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:04:06,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:04:06,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 19:04:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200539710] [2024-09-20 19:04:06,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:04:06,315 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:04:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:04:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:04:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-20 19:04:06,316 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 19:04:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:04:07,139 INFO L93 Difference]: Finished difference Result 488 states and 663 transitions. [2024-09-20 19:04:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:04:07,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 145 [2024-09-20 19:04:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:04:07,142 INFO L225 Difference]: With dead ends: 488 [2024-09-20 19:04:07,142 INFO L226 Difference]: Without dead ends: 481 [2024-09-20 19:04:07,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-20 19:04:07,144 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:04:07,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 233 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:04:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-20 19:04:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2024-09-20 19:04:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 254 states have internal predecessors, (289), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:04:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 653 transitions. [2024-09-20 19:04:07,504 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 653 transitions. Word has length 145 [2024-09-20 19:04:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:04:07,505 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 653 transitions. [2024-09-20 19:04:07,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 19:04:07,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 653 transitions. [2024-09-20 19:04:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-09-20 19:04:07,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:04:07,507 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:04:07,525 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-20 19:04:07,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 19:04:07,712 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:04:07,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1961731402, now seen corresponding path program 10 times [2024-09-20 19:04:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:04:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039183300] [2024-09-20 19:04:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:04:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:04:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:04:07,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700720123] [2024-09-20 19:04:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:04:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:04:07,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:04:07,742 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) [2024-09-20 19:04:07,744 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 19:04:07,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:04:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:04:07,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 19:04:07,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:04:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 95 proven. 89 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-09-20 19:04:08,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:04:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 123 proven. 7 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-09-20 19:04:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:04:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039183300] [2024-09-20 19:04:08,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:04:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700720123] [2024-09-20 19:04:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700720123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:04:08,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:04:08,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2024-09-20 19:04:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758441019] [2024-09-20 19:04:08,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:04:08,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:04:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:04:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:04:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:04:08,543 INFO L87 Difference]: Start difference. First operand 478 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-20 19:04:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:04:11,359 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2024-09-20 19:04:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 19:04:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 154 [2024-09-20 19:04:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:04:11,362 INFO L225 Difference]: With dead ends: 501 [2024-09-20 19:04:11,362 INFO L226 Difference]: Without dead ends: 499 [2024-09-20 19:04:11,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 19:04:11,363 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-20 19:04:11,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-20 19:04:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-20 19:04:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 486. [2024-09-20 19:04:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 259 states have (on average 1.138996138996139) internal successors, (295), 260 states have internal predecessors, (295), 183 states have call successors, (183), 44 states have call predecessors, (183), 43 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:04:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 659 transitions. [2024-09-20 19:04:11,698 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 659 transitions. Word has length 154 [2024-09-20 19:04:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:04:11,699 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 659 transitions. [2024-09-20 19:04:11,699 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-20 19:04:11,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 659 transitions. [2024-09-20 19:04:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-20 19:04:11,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:04:11,701 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:04:11,718 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 19:04:11,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 19:04:11,902 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:04:11,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1660634611, now seen corresponding path program 11 times [2024-09-20 19:04:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:04:11,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181953000] [2024-09-20 19:04:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:04:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:04:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:04:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790376023] [2024-09-20 19:04:11,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:04:11,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:04:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:04:11,929 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:04:11,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 19:04:12,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 19:04:12,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:04:12,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-20 19:04:12,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:04:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-20 19:04:12,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:04:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-20 19:04:13,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:04:13,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181953000] [2024-09-20 19:04:13,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:04:13,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790376023] [2024-09-20 19:04:13,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790376023] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:04:13,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:04:13,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-09-20 19:04:13,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230584262] [2024-09-20 19:04:13,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:04:13,861 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:04:13,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:04:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:04:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:04:13,861 INFO L87 Difference]: Start difference. First operand 486 states and 659 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-20 19:04:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:04:16,005 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2024-09-20 19:04:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:04:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 159 [2024-09-20 19:04:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:04:16,008 INFO L225 Difference]: With dead ends: 523 [2024-09-20 19:04:16,008 INFO L226 Difference]: Without dead ends: 521 [2024-09-20 19:04:16,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 19:04:16,009 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:04:16,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 625 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 19:04:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-09-20 19:04:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2024-09-20 19:04:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 262 states have (on average 1.1374045801526718) internal successors, (298), 263 states have internal predecessors, (298), 183 states have call successors, (183), 45 states have call predecessors, (183), 44 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:04:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-09-20 19:04:16,398 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 159 [2024-09-20 19:04:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:04:16,399 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-09-20 19:04:16,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-20 19:04:16,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-09-20 19:04:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-20 19:04:16,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:04:16,401 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:04:16,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 19:04:16,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 19:04:16,602 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:04:16,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1550967297, now seen corresponding path program 12 times [2024-09-20 19:04:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:04:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560590812] [2024-09-20 19:04:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:04:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:04:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:04:16,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695924177] [2024-09-20 19:04:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:04:16,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:04:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:04:16,624 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:04:16,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 19:04:16,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 19:04:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:04:16,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 19:04:16,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:04:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-09-20 19:04:17,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:04:17,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:04:17,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560590812] [2024-09-20 19:04:17,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:04:17,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695924177] [2024-09-20 19:04:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695924177] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:04:17,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:04:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 19:04:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926959035] [2024-09-20 19:04:17,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:04:17,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:04:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:04:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:04:17,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:04:17,879 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-20 19:04:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:04:18,728 INFO L93 Difference]: Finished difference Result 502 states and 672 transitions. [2024-09-20 19:04:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 19:04:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 161 [2024-09-20 19:04:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:04:18,732 INFO L225 Difference]: With dead ends: 502 [2024-09-20 19:04:18,732 INFO L226 Difference]: Without dead ends: 500 [2024-09-20 19:04:18,732 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:04:18,732 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:04:18,733 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:04:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-09-20 19:04:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 459. [2024-09-20 19:04:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 167 states have call successors, (167), 44 states have call predecessors, (167), 43 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-20 19:04:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 613 transitions. [2024-09-20 19:04:19,085 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 613 transitions. Word has length 161 [2024-09-20 19:04:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:04:19,085 INFO L474 AbstractCegarLoop]: Abstraction has 459 states and 613 transitions. [2024-09-20 19:04:19,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-20 19:04:19,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 613 transitions. [2024-09-20 19:04:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-20 19:04:19,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:04:19,088 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:04:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 19:04:19,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:04:19,289 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:04:19,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:04:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash 359715818, now seen corresponding path program 13 times [2024-09-20 19:04:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:04:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699688070] [2024-09-20 19:04:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:04:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:04:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:04:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297280028] [2024-09-20 19:04:19,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:04:19,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:04:19,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:04:19,310 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:04:19,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 19:04:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:04:19,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-20 19:04:19,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:04:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 116 proven. 157 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-09-20 19:04:21,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:04:59,883 WARN L293 SmtUtils]: Spent 9.74s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:04:59,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:04:59,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699688070] [2024-09-20 19:04:59,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:04:59,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297280028] [2024-09-20 19:04:59,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297280028] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:04:59,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:04:59,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 19:04:59,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063689600] [2024-09-20 19:04:59,885 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:04:59,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:04:59,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:04:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:04:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 19:04:59,887 INFO L87 Difference]: Start difference. First operand 459 states and 613 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-20 19:05:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:05:01,341 INFO L93 Difference]: Finished difference Result 483 states and 639 transitions. [2024-09-20 19:05:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:05:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-20 19:05:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:05:01,345 INFO L225 Difference]: With dead ends: 483 [2024-09-20 19:05:01,346 INFO L226 Difference]: Without dead ends: 481 [2024-09-20 19:05:01,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 19:05:01,347 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:05:01,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 409 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 19:05:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-20 19:05:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2024-09-20 19:05:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 259 states have (on average 1.1312741312741312) internal successors, (293), 260 states have internal predecessors, (293), 171 states have call successors, (171), 47 states have call predecessors, (171), 46 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-20 19:05:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 633 transitions. [2024-09-20 19:05:01,751 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 633 transitions. Word has length 164 [2024-09-20 19:05:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:05:01,751 INFO L474 AbstractCegarLoop]: Abstraction has 477 states and 633 transitions. [2024-09-20 19:05:01,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-20 19:05:01,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 633 transitions. [2024-09-20 19:05:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-20 19:05:01,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:05:01,754 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:05:01,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-20 19:05:01,958 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 19:05:01,959 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:05:01,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1256755380, now seen corresponding path program 14 times [2024-09-20 19:05:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:05:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819615075] [2024-09-20 19:05:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:05:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:05:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:05:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463482939] [2024-09-20 19:05:01,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:05:01,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:05:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:05:01,997 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:05:01,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 19:05:02,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:05:02,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:05:02,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 19:05:02,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:05:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 210 proven. 156 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2024-09-20 19:05:07,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:05:08,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:05:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819615075] [2024-09-20 19:05:08,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:05:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463482939] [2024-09-20 19:05:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463482939] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:05:08,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:05:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 19:05:08,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791214938] [2024-09-20 19:05:08,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:05:08,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:05:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:05:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:05:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:05:08,157 INFO L87 Difference]: Start difference. First operand 477 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-20 19:05:15,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:05:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:05:17,900 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2024-09-20 19:05:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:05:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-20 19:05:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:05:17,903 INFO L225 Difference]: With dead ends: 526 [2024-09-20 19:05:17,903 INFO L226 Difference]: Without dead ends: 524 [2024-09-20 19:05:17,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-09-20 19:05:17,904 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:05:17,905 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 812 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2024-09-20 19:05:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-20 19:05:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 514. [2024-09-20 19:05:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 280 states have (on average 1.1285714285714286) internal successors, (316), 281 states have internal predecessors, (316), 183 states have call successors, (183), 51 states have call predecessors, (183), 50 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 19:05:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 680 transitions. [2024-09-20 19:05:18,395 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 680 transitions. Word has length 164 [2024-09-20 19:05:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:05:18,396 INFO L474 AbstractCegarLoop]: Abstraction has 514 states and 680 transitions. [2024-09-20 19:05:18,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-20 19:05:18,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 680 transitions. [2024-09-20 19:05:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-09-20 19:05:18,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:05:18,399 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:05:18,417 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-20 19:05:18,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:05:18,599 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:05:18,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1039525467, now seen corresponding path program 15 times [2024-09-20 19:05:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:05:18,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989231207] [2024-09-20 19:05:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:05:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:05:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:05:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244592651] [2024-09-20 19:05:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:05:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:05:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:05:18,622 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:05:18,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 19:05:18,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:05:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:05:18,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:05:18,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:05:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 174 proven. 32 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-09-20 19:05:20,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:05:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:05:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989231207] [2024-09-20 19:05:21,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:05:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244592651] [2024-09-20 19:05:21,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244592651] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:05:21,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:05:21,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 19:05:21,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61702374] [2024-09-20 19:05:21,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:05:21,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:05:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:05:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:05:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:05:21,026 INFO L87 Difference]: Start difference. First operand 514 states and 680 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-20 19:05:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:05:23,664 INFO L93 Difference]: Finished difference Result 574 states and 765 transitions. [2024-09-20 19:05:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 19:05:23,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 167 [2024-09-20 19:05:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:05:23,668 INFO L225 Difference]: With dead ends: 574 [2024-09-20 19:05:23,669 INFO L226 Difference]: Without dead ends: 572 [2024-09-20 19:05:23,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:05:23,670 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:05:23,670 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 19:05:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-20 19:05:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2024-09-20 19:05:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 207 states have call successors, (207), 54 states have call predecessors, (207), 53 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-20 19:05:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 759 transitions. [2024-09-20 19:05:24,125 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 759 transitions. Word has length 167 [2024-09-20 19:05:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:05:24,125 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 759 transitions. [2024-09-20 19:05:24,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-20 19:05:24,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 759 transitions. [2024-09-20 19:05:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-20 19:05:24,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:05:24,128 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:05:24,146 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-20 19:05:24,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:05:24,329 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:05:24,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash 487523073, now seen corresponding path program 4 times [2024-09-20 19:05:24,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:05:24,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306914201] [2024-09-20 19:05:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:05:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:05:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:05:24,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858623129] [2024-09-20 19:05:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:05:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:05:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:05:24,352 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:05:24,354 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 19:05:24,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:05:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:05:24,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-20 19:05:24,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:05:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 113 proven. 110 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-20 19:05:26,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:05:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:05:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306914201] [2024-09-20 19:05:34,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:05:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858623129] [2024-09-20 19:05:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858623129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:05:34,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:05:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 19:05:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960294995] [2024-09-20 19:05:34,168 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:05:34,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:05:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:05:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:05:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=935, Unknown=1, NotChecked=0, Total=1056 [2024-09-20 19:05:34,170 INFO L87 Difference]: Start difference. First operand 568 states and 759 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-20 19:05:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:05:36,171 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2024-09-20 19:05:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:05:36,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-09-20 19:05:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:05:36,174 INFO L225 Difference]: With dead ends: 628 [2024-09-20 19:05:36,174 INFO L226 Difference]: Without dead ends: 621 [2024-09-20 19:05:36,175 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=204, Invalid=1517, Unknown=1, NotChecked=0, Total=1722 [2024-09-20 19:05:36,175 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:05:36,176 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 19:05:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-09-20 19:05:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 596. [2024-09-20 19:05:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 323 states have (on average 1.130030959752322) internal successors, (365), 324 states have internal predecessors, (365), 215 states have call successors, (215), 58 states have call predecessors, (215), 57 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2024-09-20 19:05:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 793 transitions. [2024-09-20 19:05:36,671 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 793 transitions. Word has length 170 [2024-09-20 19:05:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:05:36,671 INFO L474 AbstractCegarLoop]: Abstraction has 596 states and 793 transitions. [2024-09-20 19:05:36,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-20 19:05:36,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 793 transitions. [2024-09-20 19:05:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-20 19:05:36,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:05:36,673 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:05:36,692 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-20 19:05:36,874 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-20 19:05:36,874 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:05:36,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:05:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1959567971, now seen corresponding path program 5 times [2024-09-20 19:05:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:05:36,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911001386] [2024-09-20 19:05:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:05:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:05:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:05:36,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359614210] [2024-09-20 19:05:36,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:05:36,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:05:36,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:05:36,901 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:05:36,902 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 19:05:37,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 19:05:37,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:05:37,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 19:05:37,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:06:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 133 proven. 144 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2024-09-20 19:06:05,270 INFO L327 TraceCheckSpWp]: Computing backward predicates...