./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.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 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:29:52,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:29:52,361 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:29:52,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:29:52,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:29:52,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:29:52,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:29:52,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:29:52,394 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:29:52,395 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:29:52,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:29:52,396 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:29:52,396 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:29:52,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:29:52,397 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:29:52,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:29:52,398 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:29:52,398 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:29:52,399 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:29:52,399 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:29:52,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:29:52,403 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:29:52,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:29:52,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:29:52,406 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:29:52,406 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:29:52,407 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:29:52,407 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:29:52,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:29:52,408 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:29:52,408 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:29:52,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:29:52,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:29:52,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:29:52,409 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:29:52,409 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:29:52,409 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:29:52,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:29:52,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:29:52,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:29:52,411 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:29:52,411 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:29:52,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b9505d3a064a677b57bccb6de3a4c04e873275d34ee3c16e80371638b07149 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:29:52,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:29:52,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:29:52,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:29:52,762 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:29:52,762 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:29:52,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-09-15 19:29:54,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:29:54,431 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:29:54,432 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2024-09-15 19:29:54,441 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6fd17e06c/bbdad7ae282e4a41ad771934cbeeba76/FLAG30e2c0c5d [2024-09-15 19:29:54,451 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6fd17e06c/bbdad7ae282e4a41ad771934cbeeba76 [2024-09-15 19:29:54,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:29:54,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:29:54,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:29:54,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:29:54,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:29:54,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ffe39e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54, skipping insertion in model container [2024-09-15 19:29:54,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,479 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:29:54,625 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2024-09-15 19:29:54,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:29:54,658 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:29:54,671 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2024-09-15 19:29:54,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:29:54,699 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:29:54,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54 WrapperNode [2024-09-15 19:29:54,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:29:54,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:29:54,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:29:54,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:29:54,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,719 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:29:54,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:29:54,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:29:54,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:29:54,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:29:54,730 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,735 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,753 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-15 19:29:54,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,760 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,767 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:29:54,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:29:54,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:29:54,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:29:54,776 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (1/1) ... [2024-09-15 19:29:54,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:29:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:29:54,808 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) [2024-09-15 19:29:54,811 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 [2024-09-15 19:29:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:29:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:29:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:29:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:29:54,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:29:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:29:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:29:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:29:54,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:29:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:29:54,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:29:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:29:54,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:29:54,923 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:29:54,926 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:29:55,108 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:29:55,109 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:29:55,134 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:29:55,135 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:29:55,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:29:55 BoogieIcfgContainer [2024-09-15 19:29:55,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:29:55,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:29:55,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:29:55,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:29:55,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:29:54" (1/3) ... [2024-09-15 19:29:55,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b01b1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:29:55, skipping insertion in model container [2024-09-15 19:29:55,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:29:54" (2/3) ... [2024-09-15 19:29:55,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b01b1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:29:55, skipping insertion in model container [2024-09-15 19:29:55,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:29:55" (3/3) ... [2024-09-15 19:29:55,143 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2024-09-15 19:29:55,157 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:29:55,157 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:29:55,211 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:29:55,217 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;@526f05ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:29:55,217 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:29:55,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:29:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 19:29:55,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:55,228 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:55,229 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:55,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-09-15 19:29:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:55,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453547515] [2024-09-15 19:29:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:55,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:55,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:29:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:55,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:29:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:29:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453547515] [2024-09-15 19:29:55,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453547515] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:29:55,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:29:55,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:29:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977085987] [2024-09-15 19:29:55,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:55,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:29:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:29:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:29:55,439 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:29:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:55,472 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-09-15 19:29:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:29:55,475 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-15 19:29:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:55,482 INFO L225 Difference]: With dead ends: 58 [2024-09-15 19:29:55,482 INFO L226 Difference]: Without dead ends: 29 [2024-09-15 19:29:55,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:29:55,491 INFO L434 NwaCegarLoop]: 39 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, 39 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 [2024-09-15 19:29:55,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:29:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-15 19:29:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-15 19:29:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:29:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-09-15 19:29:55,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-09-15 19:29:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:55,528 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-09-15 19:29:55,528 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:29:55,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-09-15 19:29:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 19:29:55,530 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:55,531 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:55,531 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:29:55,532 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:55,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-09-15 19:29:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:55,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263123759] [2024-09-15 19:29:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:55,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:29:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:55,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:29:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:29:55,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:55,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263123759] [2024-09-15 19:29:55,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263123759] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:29:55,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:29:55,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:29:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108198155] [2024-09-15 19:29:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:55,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:29:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:29:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:29:55,790 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:29:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:55,909 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-15 19:29:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:29:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-15 19:29:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:55,939 INFO L225 Difference]: With dead ends: 42 [2024-09-15 19:29:55,939 INFO L226 Difference]: Without dead ends: 40 [2024-09-15 19:29:55,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:29:55,941 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:29:55,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:29:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-15 19:29:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-09-15 19:29:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:29:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-15 19:29:55,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-09-15 19:29:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:55,960 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-15 19:29:55,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:29:55,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-15 19:29:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-15 19:29:55,962 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:55,963 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:55,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:29:55,963 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-09-15 19:29:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586447723] [2024-09-15 19:29:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:56,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:29:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:56,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:29:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:56,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:29:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:29:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586447723] [2024-09-15 19:29:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586447723] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:29:56,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:29:56,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:29:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904440044] [2024-09-15 19:29:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:56,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:29:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:29:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:29:56,130 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:29:56,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:56,199 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-15 19:29:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:29:56,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-15 19:29:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:56,201 INFO L225 Difference]: With dead ends: 46 [2024-09-15 19:29:56,201 INFO L226 Difference]: Without dead ends: 44 [2024-09-15 19:29:56,201 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:29:56,202 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:29:56,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:29:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-15 19:29:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-09-15 19:29:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:29:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-15 19:29:56,215 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-09-15 19:29:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:56,215 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-15 19:29:56,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:29:56,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-15 19:29:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 19:29:56,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:56,217 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:56,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:29:56,217 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:56,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-09-15 19:29:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:56,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757767054] [2024-09-15 19:29:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:29:56,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461200542] [2024-09-15 19:29:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:56,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:29:56,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:29:56,238 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) [2024-09-15 19:29:56,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:29:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:56,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 19:29:56,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:29:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:29:56,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:29:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757767054] [2024-09-15 19:29:56,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:29:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461200542] [2024-09-15 19:29:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461200542] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:29:56,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:29:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:29:56,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360523833] [2024-09-15 19:29:56,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:56,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:29:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:29:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:29:56,437 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:29:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:56,512 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-15 19:29:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:29:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-15 19:29:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:56,516 INFO L225 Difference]: With dead ends: 63 [2024-09-15 19:29:56,516 INFO L226 Difference]: Without dead ends: 50 [2024-09-15 19:29:56,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:29:56,517 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:29:56,517 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:29:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-15 19:29:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-15 19:29:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-15 19:29:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-15 19:29:56,533 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-09-15 19:29:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:56,534 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-15 19:29:56,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:29:56,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-15 19:29:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 19:29:56,537 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:56,537 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:56,555 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:29:56,737 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:29:56,738 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:56,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-09-15 19:29:56,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:56,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047826255] [2024-09-15 19:29:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:56,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:29:56,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264052100] [2024-09-15 19:29:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:56,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:29:56,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:29:56,771 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) [2024-09-15 19:29:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:29:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:56,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:29:56,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:29:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:29:56,924 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:29:56,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:56,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047826255] [2024-09-15 19:29:56,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:29:56,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264052100] [2024-09-15 19:29:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264052100] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:29:56,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:29:56,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:29:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573385641] [2024-09-15 19:29:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:56,927 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:29:56,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:29:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:29:56,930 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:29:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:57,015 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-09-15 19:29:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:29:57,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-15 19:29:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:57,017 INFO L225 Difference]: With dead ends: 63 [2024-09-15 19:29:57,017 INFO L226 Difference]: Without dead ends: 61 [2024-09-15 19:29:57,018 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 [2024-09-15 19:29:57,018 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:29:57,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 95 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:29:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-15 19:29:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-09-15 19:29:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 19:29:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-09-15 19:29:57,040 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-09-15 19:29:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:57,041 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-09-15 19:29:57,041 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:29:57,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-09-15 19:29:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 19:29:57,042 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:57,042 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:57,055 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:29:57,243 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:29:57,243 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:57,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-09-15 19:29:57,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:57,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241388251] [2024-09-15 19:29:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:57,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:29:57,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308407322] [2024-09-15 19:29:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:57,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:29:57,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:29:57,261 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) [2024-09-15 19:29:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:29:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:57,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 19:29:57,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:29:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:29:57,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:29:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 19:29:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:57,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241388251] [2024-09-15 19:29:57,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:29:57,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308407322] [2024-09-15 19:29:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308407322] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:29:57,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:29:57,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-15 19:29:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399212546] [2024-09-15 19:29:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:57,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:29:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:29:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:29:57,572 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:29:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:57,652 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-15 19:29:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:29:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-09-15 19:29:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:57,655 INFO L225 Difference]: With dead ends: 70 [2024-09-15 19:29:57,655 INFO L226 Difference]: Without dead ends: 68 [2024-09-15 19:29:57,655 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:29:57,659 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:29:57,661 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:29:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-15 19:29:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-15 19:29:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:29:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-09-15 19:29:57,684 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-09-15 19:29:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:57,684 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-09-15 19:29:57,684 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:29:57,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-09-15 19:29:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 19:29:57,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:57,690 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-09-15 19:29:57,707 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:29:57,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 19:29:57,895 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:57,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-09-15 19:29:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:57,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670576147] [2024-09-15 19:29:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:29:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:29:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:29:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:29:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 19:29:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 19:29:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 19:29:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:29:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 19:29:58,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:58,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670576147] [2024-09-15 19:29:58,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670576147] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:29:58,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:29:58,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:29:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598437830] [2024-09-15 19:29:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:29:58,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:29:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:29:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:29:58,060 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-09-15 19:29:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:29:58,126 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-09-15 19:29:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:29:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 49 [2024-09-15 19:29:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:29:58,131 INFO L225 Difference]: With dead ends: 75 [2024-09-15 19:29:58,131 INFO L226 Difference]: Without dead ends: 63 [2024-09-15 19:29:58,131 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:29:58,132 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:29:58,132 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:29:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-15 19:29:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-15 19:29:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 19:29:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-09-15 19:29:58,152 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-09-15 19:29:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:29:58,152 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-09-15 19:29:58,153 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-09-15 19:29:58,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-09-15 19:29:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-15 19:29:58,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:29:58,155 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:29:58,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 19:29:58,155 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:29:58,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:29:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-09-15 19:29:58,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:29:58,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222224129] [2024-09-15 19:29:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:58,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:29:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:29:58,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069178209] [2024-09-15 19:29:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:29:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:29:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:29:58,180 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) [2024-09-15 19:29:58,181 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:29:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:29:58,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-15 19:29:58,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:29:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-15 19:29:58,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:29:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-15 19:29:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:29:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222224129] [2024-09-15 19:29:59,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:29:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069178209] [2024-09-15 19:29:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069178209] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:29:59,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:29:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-15 19:29:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131628728] [2024-09-15 19:29:59,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:29:59,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:29:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:29:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:29:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:29:59,948 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-15 19:30:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:00,589 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2024-09-15 19:30:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:30:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 63 [2024-09-15 19:30:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:00,592 INFO L225 Difference]: With dead ends: 138 [2024-09-15 19:30:00,592 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 19:30:00,592 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:30:00,593 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:00,593 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 225 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:30:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 19:30:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-15 19:30:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-15 19:30:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-09-15 19:30:00,633 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 63 [2024-09-15 19:30:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:00,634 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-09-15 19:30:00,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-15 19:30:00,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-09-15 19:30:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-15 19:30:00,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:00,636 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:00,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:30:00,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:00,837 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:00,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-09-15 19:30:00,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866233109] [2024-09-15 19:30:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:00,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:30:00,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713179719] [2024-09-15 19:30:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:00,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:00,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:00,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:30:00,861 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:30:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:00,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 19:30:00,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-15 19:30:01,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-15 19:30:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866233109] [2024-09-15 19:30:01,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:30:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713179719] [2024-09-15 19:30:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713179719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:01,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:30:01,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-15 19:30:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092329105] [2024-09-15 19:30:01,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:01,634 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:30:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:30:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:30:01,635 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-15 19:30:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:02,364 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2024-09-15 19:30:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:30:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 74 [2024-09-15 19:30:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:02,367 INFO L225 Difference]: With dead ends: 168 [2024-09-15 19:30:02,367 INFO L226 Difference]: Without dead ends: 136 [2024-09-15 19:30:02,370 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:30:02,370 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:02,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 195 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:30:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-15 19:30:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2024-09-15 19:30:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 70 states have internal predecessors, (76), 31 states have call successors, (31), 14 states have call predecessors, (31), 13 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-15 19:30:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2024-09-15 19:30:02,418 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 74 [2024-09-15 19:30:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:02,419 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2024-09-15 19:30:02,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-15 19:30:02,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2024-09-15 19:30:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-15 19:30:02,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:02,421 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:02,438 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:02,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:02,626 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:02,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-09-15 19:30:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:02,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823056776] [2024-09-15 19:30:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:30:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:30:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:30:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:30:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 19:30:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 19:30:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 19:30:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 19:30:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:30:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:30:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 19:30:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 19:30:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:30:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 19:30:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823056776] [2024-09-15 19:30:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823056776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:30:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311644846] [2024-09-15 19:30:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:02,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:02,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:02,959 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) [2024-09-15 19:30:02,964 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:30:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:03,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 19:30:03,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 19:30:03,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 19:30:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311644846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:03,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:30:03,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-15 19:30:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081857853] [2024-09-15 19:30:03,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:03,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:30:03,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:03,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:30:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:30:03,533 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2024-09-15 19:30:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:03,729 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2024-09-15 19:30:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 19:30:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 79 [2024-09-15 19:30:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:03,731 INFO L225 Difference]: With dead ends: 129 [2024-09-15 19:30:03,732 INFO L226 Difference]: Without dead ends: 100 [2024-09-15 19:30:03,732 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:30:03,733 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:03,733 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 225 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:30:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-15 19:30:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-09-15 19:30:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-15 19:30:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2024-09-15 19:30:03,761 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 79 [2024-09-15 19:30:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:03,761 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2024-09-15 19:30:03,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2024-09-15 19:30:03,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2024-09-15 19:30:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-15 19:30:03,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:03,763 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:03,780 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:03,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 19:30:03,964 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:03,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 2 times [2024-09-15 19:30:03,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:03,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414344168] [2024-09-15 19:30:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:03,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:30:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:30:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:30:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:30:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 19:30:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 19:30:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 19:30:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 19:30:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:30:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:30:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-15 19:30:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 19:30:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 19:30:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 19:30:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 19:30:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-15 19:30:04,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:04,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414344168] [2024-09-15 19:30:04,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414344168] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:30:04,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448005927] [2024-09-15 19:30:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:30:04,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:04,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:04,444 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) [2024-09-15 19:30:04,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:30:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:30:04,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:30:04,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 19:30:04,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-15 19:30:04,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-15 19:30:05,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448005927] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:05,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:30:05,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2024-09-15 19:30:05,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247524056] [2024-09-15 19:30:05,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:05,501 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:30:05,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:05,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:30:05,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:30:05,503 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 14 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 15 states have call predecessors, (42), 13 states have call successors, (42) [2024-09-15 19:30:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:05,859 INFO L93 Difference]: Finished difference Result 167 states and 202 transitions. [2024-09-15 19:30:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:30:05,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 14 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 15 states have call predecessors, (42), 13 states have call successors, (42) Word has length 93 [2024-09-15 19:30:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:05,861 INFO L225 Difference]: With dead ends: 167 [2024-09-15 19:30:05,861 INFO L226 Difference]: Without dead ends: 104 [2024-09-15 19:30:05,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2024-09-15 19:30:05,862 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:05,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 417 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:30:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-15 19:30:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-09-15 19:30:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.05) internal successors, (63), 63 states have internal predecessors, (63), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-15 19:30:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-09-15 19:30:05,895 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 93 [2024-09-15 19:30:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:05,896 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-09-15 19:30:05,896 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 14 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 15 states have call predecessors, (42), 13 states have call successors, (42) [2024-09-15 19:30:05,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-09-15 19:30:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-15 19:30:05,898 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:05,898 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:05,917 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:06,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:06,103 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:06,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1803901173, now seen corresponding path program 1 times [2024-09-15 19:30:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377871852] [2024-09-15 19:30:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:06,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:30:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:30:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:30:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:30:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 19:30:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 19:30:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 19:30:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 19:30:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:30:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:30:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-15 19:30:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 19:30:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 19:30:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 19:30:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 19:30:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2024-09-15 19:30:06,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377871852] [2024-09-15 19:30:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377871852] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:30:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631357159] [2024-09-15 19:30:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:06,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:06,256 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) [2024-09-15 19:30:06,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:30:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:06,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 19:30:06,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2024-09-15 19:30:06,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:30:06,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631357159] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:30:06,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:30:06,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-09-15 19:30:06,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211552296] [2024-09-15 19:30:06,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:30:06,438 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:30:06,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:30:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:30:06,439 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-15 19:30:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:06,523 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2024-09-15 19:30:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:30:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 93 [2024-09-15 19:30:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:06,524 INFO L225 Difference]: With dead ends: 118 [2024-09-15 19:30:06,525 INFO L226 Difference]: Without dead ends: 84 [2024-09-15 19:30:06,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:30:06,525 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:06,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:30:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-15 19:30:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-09-15 19:30:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:30:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-09-15 19:30:06,555 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 93 [2024-09-15 19:30:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:06,556 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-09-15 19:30:06,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-15 19:30:06,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-09-15 19:30:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-15 19:30:06,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:06,558 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:06,575 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:30:06,761 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:06,762 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 334767440, now seen corresponding path program 2 times [2024-09-15 19:30:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90320524] [2024-09-15 19:30:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:30:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693075341] [2024-09-15 19:30:06,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:30:06,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:06,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:06,786 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) [2024-09-15 19:30:06,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:30:06,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:30:06,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:30:06,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-15 19:30:06,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-15 19:30:07,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-15 19:30:25,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90320524] [2024-09-15 19:30:25,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:30:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693075341] [2024-09-15 19:30:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693075341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:25,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:30:25,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-15 19:30:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101451318] [2024-09-15 19:30:25,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:25,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:30:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:30:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:30:25,970 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-09-15 19:30:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:26,154 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2024-09-15 19:30:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:30:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 98 [2024-09-15 19:30:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:26,156 INFO L225 Difference]: With dead ends: 94 [2024-09-15 19:30:26,156 INFO L226 Difference]: Without dead ends: 92 [2024-09-15 19:30:26,156 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:30:26,157 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:26,157 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 297 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:30:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-15 19:30:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-09-15 19:30:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:30:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2024-09-15 19:30:26,178 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 98 [2024-09-15 19:30:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:26,179 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2024-09-15 19:30:26,179 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 7 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2024-09-15 19:30:26,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2024-09-15 19:30:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-15 19:30:26,181 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:26,181 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 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, 1] [2024-09-15 19:30:26,196 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:30:26,384 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 19:30:26,385 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:26,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -943794067, now seen corresponding path program 1 times [2024-09-15 19:30:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361107305] [2024-09-15 19:30:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:30:26,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097843382] [2024-09-15 19:30:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:26,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:26,416 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) [2024-09-15 19:30:26,419 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:30:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:26,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-15 19:30:26,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-15 19:30:26,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-15 19:30:27,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361107305] [2024-09-15 19:30:27,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:30:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097843382] [2024-09-15 19:30:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097843382] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:27,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:30:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-09-15 19:30:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54253096] [2024-09-15 19:30:27,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:27,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 19:30:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 19:30:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-09-15 19:30:27,634 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2024-09-15 19:30:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:27,852 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2024-09-15 19:30:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:30:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 104 [2024-09-15 19:30:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:27,854 INFO L225 Difference]: With dead ends: 98 [2024-09-15 19:30:27,854 INFO L226 Difference]: Without dead ends: 94 [2024-09-15 19:30:27,855 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:30:27,855 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:27,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 330 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:30:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-15 19:30:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-15 19:30:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.0) internal successors, (59), 59 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:30:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2024-09-15 19:30:27,881 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 104 [2024-09-15 19:30:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:27,881 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2024-09-15 19:30:27,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2024-09-15 19:30:27,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2024-09-15 19:30:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-15 19:30:27,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:30:27,883 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2024-09-15 19:30:27,902 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 19:30:28,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 19:30:28,084 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:30:28,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash -972326764, now seen corresponding path program 1 times [2024-09-15 19:30:28,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:30:28,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335155618] [2024-09-15 19:30:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:30:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:30:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:30:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:30:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:30:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 19:30:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 19:30:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 19:30:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 19:30:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 19:30:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:30:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-15 19:30:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 19:30:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 19:30:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 19:30:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 19:30:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-15 19:30:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 19:30:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-15 19:30:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 19:30:28,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:30:28,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335155618] [2024-09-15 19:30:28,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335155618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:30:28,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136123525] [2024-09-15 19:30:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:30:28,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:30:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:30:28,522 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) [2024-09-15 19:30:28,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:30:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:30:28,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 19:30:28,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:30:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-15 19:30:28,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:30:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-15 19:30:30,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136123525] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:30:30,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:30:30,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 29 [2024-09-15 19:30:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271729437] [2024-09-15 19:30:30,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:30:30,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-15 19:30:30,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:30:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-15 19:30:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-09-15 19:30:30,547 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 16 states have call predecessors, (49), 17 states have call successors, (49) [2024-09-15 19:30:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:30:30,795 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2024-09-15 19:30:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:30:30,795 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 16 states have call predecessors, (49), 17 states have call successors, (49) Word has length 109 [2024-09-15 19:30:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:30:30,796 INFO L225 Difference]: With dead ends: 94 [2024-09-15 19:30:30,796 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 19:30:30,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:30:30,797 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:30:30,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 342 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:30:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 19:30:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 19:30:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 19:30:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 19:30:30,799 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-15 19:30:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:30:30,799 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 19:30:30,799 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 27 states have internal predecessors, (63), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 16 states have call predecessors, (49), 17 states have call successors, (49) [2024-09-15 19:30:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:30:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 19:30:30,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 19:30:30,802 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 19:30:30,815 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 19:30:31,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 19:30:31,006 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:30:31,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-15 19:30:31,842 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 19:30:31,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 07:30:31 BoogieIcfgContainer [2024-09-15 19:30:31,859 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 19:30:31,860 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-15 19:30:31,860 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-15 19:30:31,860 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-15 19:30:31,860 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:29:55" (3/4) ... [2024-09-15 19:30:31,862 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-15 19:30:31,865 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-15 19:30:31,865 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-15 19:30:31,865 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-15 19:30:31,866 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-15 19:30:31,869 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2024-09-15 19:30:31,869 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-09-15 19:30:31,870 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-15 19:30:31,870 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:30:31,870 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:30:31,959 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-15 19:30:31,960 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-15 19:30:31,960 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-15 19:30:31,960 INFO L158 Benchmark]: Toolchain (without parser) took 37506.47ms. Allocated memory was 69.2MB in the beginning and 211.8MB in the end (delta: 142.6MB). Free memory was 36.7MB in the beginning and 92.5MB in the end (delta: -55.8MB). Peak memory consumption was 85.9MB. Max. memory is 16.1GB. [2024-09-15 19:30:31,961 INFO L158 Benchmark]: CDTParser took 1.40ms. Allocated memory is still 48.2MB. Free memory was 28.3MB in the beginning and 28.3MB in the end (delta: 52.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:30:31,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.40ms. Allocated memory is still 69.2MB. Free memory was 36.5MB in the beginning and 43.0MB in the end (delta: -6.5MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2024-09-15 19:30:31,962 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.25ms. Allocated memory is still 69.2MB. Free memory was 43.0MB in the beginning and 41.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:30:31,962 INFO L158 Benchmark]: Boogie Preprocessor took 52.58ms. Allocated memory is still 69.2MB. Free memory was 41.9MB in the beginning and 40.2MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-15 19:30:31,962 INFO L158 Benchmark]: RCFGBuilder took 361.71ms. Allocated memory is still 69.2MB. Free memory was 40.2MB in the beginning and 44.7MB in the end (delta: -4.5MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2024-09-15 19:30:31,963 INFO L158 Benchmark]: TraceAbstraction took 36722.07ms. Allocated memory was 69.2MB in the beginning and 211.8MB in the end (delta: 142.6MB). Free memory was 44.2MB in the beginning and 97.8MB in the end (delta: -53.6MB). Peak memory consumption was 103.9MB. Max. memory is 16.1GB. [2024-09-15 19:30:31,963 INFO L158 Benchmark]: Witness Printer took 100.31ms. Allocated memory is still 211.8MB. Free memory was 97.8MB in the beginning and 92.5MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-15 19:30:31,965 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.40ms. Allocated memory is still 48.2MB. Free memory was 28.3MB in the beginning and 28.3MB in the end (delta: 52.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.40ms. Allocated memory is still 69.2MB. Free memory was 36.5MB in the beginning and 43.0MB in the end (delta: -6.5MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.25ms. Allocated memory is still 69.2MB. Free memory was 43.0MB in the beginning and 41.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 52.58ms. Allocated memory is still 69.2MB. Free memory was 41.9MB in the beginning and 40.2MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 361.71ms. Allocated memory is still 69.2MB. Free memory was 40.2MB in the beginning and 44.7MB in the end (delta: -4.5MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36722.07ms. Allocated memory was 69.2MB in the beginning and 211.8MB in the end (delta: 142.6MB). Free memory was 44.2MB in the beginning and 97.8MB in the end (delta: -53.6MB). Peak memory consumption was 103.9MB. Max. memory is 16.1GB. * Witness Printer took 100.31ms. Allocated memory is still 211.8MB. Free memory was 97.8MB in the beginning and 92.5MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.8s, OverallIterations: 15, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 173 mSDsluCounter, 2865 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2319 mSDsCounter, 214 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1941 IncrementalHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 214 mSolverCounterUnsat, 546 mSDtfsCounter, 1941 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1701 GetRequests, 1519 SyntacticMatches, 9 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 28.6s InterpolantComputationTime, 1732 NumberOfCodeBlocks, 1732 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1927 ConstructedInterpolants, 0 QuantifiedInterpolants, 19021 SizeOfPredicates, 20 NumberOfNonLiveVariables, 2052 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 6268/6871 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((((((((((r == 0) && (A == 2)) && (q == 2)) && (d == 1)) && (B == 1)) && (p == 1)) || (((((A == r) && (p == 2)) && (d == 2)) && (q == 0)) && (B == 1))) || ((((((r == 0) && (A == 2)) && (q == 2)) && (p == 2)) && (d == 2)) && (B == 1))) || (((((A == ((long long) r + 1)) && (d == 1)) && (B == 1)) && (q == 1)) && (p == 1))) || (((((A == r) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1))) || ((((((A == 2) && (r == 2)) && (d == 4)) && (q == 0)) && (B == 1)) && (p == 4))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((A == r) && (p == 2)) && (1 <= r)) && (d == 2)) && (r <= 2)) && (q == 0)) && (B == 1)) || (((((((0 <= A) && (A == r)) && (d == 1)) && (r <= 2)) && (q == 0)) && (B == 1)) && (p == 1))) || ((((((A == 2) && (r == 2)) && (d == 4)) && (q == 0)) && (B == 1)) && (p == 4))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-15 19:30:32,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE